lst_busstop= ["龙江新城市","阳光广场","汉江路","嫩江路","清凉山公园","拉萨路", "五台山","莫愁路"]
start=input("请输入起点站: ")
end=input("请输入终点站: ")
startIndex=lst_busstop.index(start)
endIndex=lst_busstop.index(end)
if startIndex>endIndex:
    print("你需要坐反向路线")
else:
    print("从{}站到{}站要{}站".format(start,end,endIndex-startIndex))